Saw-set.



PATENTED JULY 23, 1903;

J. D. SMITH. SAW SET.

APPLIGATION FILED SEPT. 11, 1902. NO MODEL. 2 SHEETS-SHEET 1.

wine/a5 6A9? MM PATENTED JULY 28, 1903.

" J. D. SMITH.

SAW SET.

APPLICATION FILED SEPT. 11, 1902.

2 SHEETSSHEET 2.

E0 MODEL.

Patented July 28, 1903.

PATENT OFFICE.

JOHN D. SMITH, OF BONHAM, TEXAS.

SAW-SET.

SPECIFICATION forming part of Letters Patent No. 734,981, dated July 28, 1903.

Application filed September 11, 1902. Serial No. 123,017. (No model.)

To all iv/tom it may concern.-

Be it known that 1, JOHN 1). SMITH, a citizen of the United States, residing'atBonham, in the county of Fannin and State of Texas, have invented new and useful Improvements in Saw-Sets, of which the following is a specification.

This invention relates to saw-sets, and it is especially intended for use in connection with the saw-clamping means disclosed by my copending application, Serial No. 123,018, filed September 11, 1902, and forming part of a sawfiling machine.

My improved saw-set includes jaws each provided with a transverse groove having an open end, tooth-setting plates removably carried by said jaws and having tongues slidably fitted in said grooves, whereby said plates can be easily removed. In order to firmly hold the said tooth-setting plates in place, I provide latches of some suitable kind, carried by the respective jaws andhavin g catches interposed in the path of said plates to prevent their accidental withdrawal. By manipulating the latches the plates can be readily removed and others of a difiierent kind substituted therefor. Saws run in sizes, so many teeth to the inch. Thus a five-point saw is provided with four teeth to the inch, a six-point saw with five teeth to the inch, and so on, and it is for this purpose that the said plates are made removable-that is, setting-plates of one kind are provided for a five-point saw and of a different kind for a six-point saw, and so on, the plates bearing in conspicuous places their proper numbers.

The invention is clearly shown in the accompanying drawings, forming a part of this specification, in which Figure 1 is an inverted plan view of the improved saw-set with the jaws closed. Fig. 2 is a side elevation of the same. Fig. 3 is a cross-section of the sawset with the jaws thereof open, the saw-clamping jaws being also shown. Fig. at is a perspective view of one of the setting-plates detached. Fig. 5 is a similar view of the holding-latch therefor. Fig. 6 is a top plan view of the saw-set, showing the manner of using the same. Fig. 7 is a side elevation of the spacing device.

Like characters refer to like parts in all the figures.

The improved tool, embodies jaws, as 2, which maybe of any suitable form and which are shown as pivotally connected in the following manner: Theinner edges of the jaws have alternately-arranged lugs 3, fitted between each other and adapted to receive a pivot-pin 4, the opposite ends of which may be headed to hold it in place.

Arms, as 5, extend outwardly and oppositely to each other from the respective jaws, said arms terminating in handles 6, by which the jaws can be readily manipulated. The arms 5 are somewhat long, so that a powerful leverage can be applied to the jaws for the purpose of setting the teeth of a saw between the same.

Forming parts of the under sides of the jaws are the plates '7, substantially L-shaped in cross-section and the upper flanges of which are suitably united, as by riveting, to the bodies of the jaws, or said parts may be made integral, this being a matter of choice.

The jaws 2 are grooved. at S transversely thereof, the opposite ends of the grooves being open, so that the tongues or projecting portions 9 of the setting-plates 10 can be introduced into one of said open ends and slid along the grooves until the leading ends thereof strike stops projecting across the opposite open ends of the grooves, which signifies that the plates are properly disposed. The under walls of the grooves, it will be seen, are undercut on a bevel, the corresponding portion of the tongues being similarly shaped, so that when the tongues are in place the plates will be prevented from moving laterally. It will be understood, therefore, that the plates are removably mounted upon the jaws and that they are slid into place. The inner edges of the setting-plates are toothed, as at 11, the teeth of the respective plates being arranged in alternation,by reason of which the teeth of the saw can be properly set, and the setting-plates as well as the other parts of the device can be made of any suitable material, tool or other hardened steel being generally employed for making the setting-plates. The setting-plates for the different-point saws are all the same lengththat is, an even number of inches,whichin the present case is two but the number of teeth of cooperating plates correspond with the number of the saw to be set] After having set a nine-point saw with the plates shown, which, it will be seen, each have eight teeth, and it is desired to set a tenpoint saw said plates will be removed and others with nine teeth to each plate will be substituted.

It is not necessary to rely upon the friction between the toothed plates and the jaws to hold the former against endwise movement, as for this purpose I prefer to employ latches. The latches are denoted by 12, and they have at one end angular projections 13, secured to the perpendicular flanges of the plates 7 at one end thereof an d extending across the corresponding end of the grooves 8, so as to form stops against which the setting-plates 10 abut when the latter have been put into place. The free ends of the springs have angular extensions or catches 14, adapted tobe projected across the opposite ends of the grooves in order to firmly hold the toothed plates in place. The angular extensions let are provided with finger-pieces 15, by which the spring-latches can be readilymanipulated, so as to move the same. laterally and thereby release the setting-plates 10. In putting in a setting-plate the proper latch 12' is moved outward by pressing against the finger-piece 15, and a tongue or projection 9 is inserted in the groove 8 and the said tongue slid along said groove until the leading end of the plate strikes the stop or projection 13, at which point the angular extension 14 will be sprung over the rear end of the setting-plates, so as to lock the same against withdrawal, it being understood that as soon as the rib is introduced into its groove the finger-piece is released by' the user.

I employ the improved saw-set in connection with the saw-holding jaws disclosed by my copending application, to which I have hereinbefore referred, and forming part of a saw-filing machine, and in Figs. 3 and 6 of the accompanying drawings I have illustrated such jaws, the inner one or that which is secured to a work-bench or like support being denoted by 20, while the complemental jaw is denoted by 21, said jaws holding the saws between them in a vise-like grip by the pressure of the springs 22. Upon the inner one of said jaws is shiftably mounted a spacing device which cooperates with a carriage slidable on the jaws and which carries the sawfiling mechanism. In the present case I have not shown the carriage nor the parts carried thereby, as they are not necessary for use in setting the teeth of a saw, but I do show the spacing device and will briefly describe the same and its relation to the saw-set.

The saw for the purpose of filing the teeth thereof is clamped between the jaws 20 and 21 with said teeth extending above the jaws the proper distance. After filing the teeth they are set with the improved set without takingthe saw from the clamping-jaws, the teeth of the saw being left by the files of the filing-machine at the exact elevation above the jaws. In filing the teeth the operator commences at the point and works toward the heel, but in setting the teeth he starts at the heel and works toward the point.

The spacing device above mentioned is shift-ably supported by the inner jaw 20, it

having a body 23, provided with depending studs adapted to enter holes 24 spaced two inches apart in said inner jaw. Upon said body 23 is adjustably supported the notched spacing-plate 25, held in its respective positions by means including the set-screw 26, which extends through a depending lug or flange at one end of the said spacing-plate and engages the corresponding end of the body. The notched spacing-plate is not used in setting the teeth, but the set-screw 26 performs a very important function during such operation. The body 23 having been mounted at the heel of the saw, with the head of the screw 26 toward said heel, the jaws of the set will be opened and supported upon the clamping-jaws 20 and 21 and then slid along said clamping-jaws until they abut against the head of the set-screw 26, so as to assure the setting operation commencing at the exact place. The jaws of the set are then closed upon the teeth of the saw, so as to give them the proper relative angles. After this operation the body 23 is moved toward the left two inches, after which the setting-jaws are moved along the clamping-jaws until they abut against the set-screw 26, when the setting operation is repeated on the succeeding and unset two-inch section of the saw. These operations take place until all the teeth have been set, when it will be found that all the teeth of the saw have been set at the proper angles.

The spacing device, it will be seen, is advanced successively two inches at a time, by reason of which the set will, by placing the same against the spacing device in the manner described, be in the precise position required for accurate setting. The spacing device is therefore in the nature of a gage for assuring the proper positioning of the set with respect to the work to be done.

In setting the teeth the points thereof on their cutting side do not touch the saw-set, so that the saw can be set after filing without injuring the cutting efficiency of the saw.

The invention is not limited to the exact construction hereinbefore set forth, for many variations may be adopted within the scope of my claims.

Having described my claim is 1. A saw-setting device including jaws having transverse grooves open at their opposite ends, and elongated spring-latches fastened to the respective jaws, each latch having an angular extension at one end projectingacross an open end of a groove and provided at their free ends with other angular extensions projecting across the opposite ends of said grooves.

invention, what I 2. A saw-setting device including jaws having transverse grooves open at their opposite ends, and elongated spring-latches fastened to the respective'jaws, each latch having an angular extension at one end projecting across an open end of a groove and provided at their free ends with other angular extensions projecting across the opposite ends of said grooves, said last-mentioned extensions having finger-pieces for operating the latches to effect the release of toothed setting-plates fitted in said grooves.

23. A saw-setting tool including a grooved jaw, one end of the groove being open, and a spring-latch extending across said jaw and provided with an angular projection extending across said open end of the groove and In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN D. SMITH. lVitnesses:

J. M. TERRY, CHAS. T. LANE. 

